Everything since was a glorified "police action"...
You win wars by destroying the enemy's ability to fight and that means civilians suffer right along with the enemy forces. Now we try to win hearts and minds by being nice and going out of our way to not hurt anyone.
Japan and Germany did not surrender because we were nice to them. They surrendered because they knew we were going to wipe them from the face of the earth if they didn't surrender and we had destroyed their ability to fight. Their countries were in ruins and their war machines were utterly destroyed.
We went to fight Afghanistan and Iraq and let outside forces resupply the enemy. If we had used WWII doctrine we would have utterly destroyed those that were supplying the arms to our enemies as well. This is why we lose now. We don't fight to win. We fight to try and get the enemy on our side and to get them to do things our way by being nice to civilians. It doesn't work. Didn't work in Korea or Viet Nam not gonna work with the muzzies either.
We aren’t winning because we don’t believe in our own cause.
We are half-hearted; they are one-hearted in what they believe and want.
We can’t even show the Mo cartoons.
Hence, they win.